Transporter didn't image the OS?

Hi...

Trying to pull an image of an existing PC into Parallels. When I did this before, the Transporter brought data and OS. This time, it appears that it only brought over the data. When I try to start up the new vm, it eventually tells me "missing OS"

Previous successful experience was with Parallels 6...current experience is in Parallels 7.

Clues?